<template>
  <!-- 头部部分 -->
  <header class="header">
    <h1>todos</h1>
    <input class="new-todo" placeholder="请输入任务名称" autofocus @keyup.enter="addList" v-model.trim="todoName">
  </header>
</template>
<script>
export default {
  props: {},
  data() {
    return {
      todoName: ''
    }
  },
  methods: {
    addList() {
      if (!this.todoName) return alert('内容部位空')
      this.$emit('addList', this.todoName)
      this.todoName = ''
    }
  }
}
</script>

<style scoped>
</style>